/* ====================================================
   Virtual Universe Technology - Shared Styles
   Logo-matched blue theme + unified design system
   ==================================================== */

:root {
    /* ===== Logo-matched Blue Palette ===== */
    --vu-bg: #0a1628;
    --vu-bg-2: #0f1e3d;
    --vu-bg-darker: #050d1a;
    --vu-card-bg: rgba(30, 58, 138, 0.15);
    --vu-card-border: rgba(96, 165, 250, 0.18);

    --vu-primary: #1e3a8a;
    --vu-primary-dark: #050d1a;
    --vu-accent: #60a5fa;
    --vu-accent-bright: #3b82f6;
    --vu-accent-deep: #2563eb;
    --vu-accent-light: #93c5fd;

    --vu-text-light: #f1f5f9;
    --vu-text-soft: #cbd5e1;
    --vu-text-muted: #94a3b8;
    --vu-border: rgba(96, 165, 250, 0.2);

    /* Legacy aliases used by older code (mapped to new palette) */
    --vu-text-1: var(--vu-text-light);
    --vu-text-2: var(--vu-text-soft);
    --vu-text-3: var(--vu-text-muted);
    --vu-accent-dark: var(--vu-accent-deep);
}

/* ===== Smooth scrolling ===== */
html {
    scroll-behavior: smooth;
    /* Prevent layout shift on scroll */
    overflow-x: hidden;
}

/* ===== Page-load fade-in ===== */
body {
    animation: vuPageFadeIn 0.6s ease-out;
    position: relative;
    /* GPU layer promotion for body — better scroll perf */
    transform: translate3d(0, 0, 0);
    backface-visibility: hidden;
}

/* ===== Adaptive perf hints based on device tier ===== */
/* Tier set by JS via document.documentElement.setAttribute('data-tier', ...) */

/* Low-tier phones: reduce blur radius (animations stay, less GPU work) */
:root[data-tier="low"] .vu-blob { filter: blur(45px) !important; }
:root[data-tier="low"] .vu-bg-mesh::before { filter: blur(40px) !important; }
:root[data-tier="low"] .vu-header { backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); }
:root[data-tier="low"] .content-card { backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px); }

/* Medium tier — moderate */
:root[data-tier="medium"] .vu-blob { filter: blur(60px) !important; }
:root[data-tier="medium"] .vu-bg-mesh::before { filter: blur(55px) !important; }

/* Off-screen sections: skip rendering (HUGE mobile perf win — content-visibility) */
section,
.customer-stories,
.industries-section,
.customer-service,
.chartonix-showcase,
.vu-footer {
    content-visibility: auto;
    contain-intrinsic-size: auto 700px;
}

/* Cards: paint containment for faster scroll */
.service-box,
.industry-card,
.story-box,
.service-card,
.ai-tool-card,
.content-card,
.goal-card,
.stat-card {
    contain: layout style paint;
    transform: translate3d(0, 0, 0);
}

@keyframes vuPageFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ===== Animated Background Blobs (real DOM elements, light theme) ===== */
.vu-blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(90px);
    pointer-events: none;
    will-change: transform;
    z-index: -8;
}

.vu-blob.blob-1 {
    width: 620px;
    height: 620px;
    top: -150px;
    left: -150px;
    background: radial-gradient(circle, #93c5fd 0%, #60a5fa 45%, transparent 75%);
    opacity: 0.70;
    animation: vuBlob1 22s ease-in-out infinite;
}

.vu-blob.blob-2 {
    width: 720px;
    height: 720px;
    bottom: -200px;
    right: -200px;
    background: radial-gradient(circle, #3b82f6 0%, #2563eb 45%, transparent 75%);
    opacity: 0.55;
    animation: vuBlob2 28s ease-in-out infinite;
}

@keyframes vuBlob1 {
    0%, 100%   { transform: translate(0, 0) scale(1); }
    25%        { transform: translate(120px, 80px) scale(1.15); }
    50%        { transform: translate(60px, 200px) scale(0.95); }
    75%        { transform: translate(-40px, 120px) scale(1.1); }
}

@keyframes vuBlob2 {
    0%, 100%   { transform: translate(0, 0) scale(1); }
    33%        { transform: translate(-160px, -100px) scale(1.1); }
    66%        { transform: translate(-80px, -220px) scale(0.92); }
}

/* Optional: extra animated mesh layer (third blob via a wrapper) */
.vu-bg-mesh {
    position: fixed;
    inset: 0;
    z-index: -7;
    pointer-events: none;
    overflow: hidden;
}

.vu-bg-mesh::before {
    content: '';
    position: absolute;
    width: 480px;
    height: 480px;
    top: 35%;
    left: 50%;
    border-radius: 50%;
    background: radial-gradient(circle, #dbeafe 0%, #93c5fd 50%, transparent 75%);
    filter: blur(80px);
    opacity: 0.55;
    transform: translate(-50%, -50%);
    animation: vuBlob3 26s ease-in-out infinite;
}

@keyframes vuBlob3 {
    0%, 100% { transform: translate(-50%, -50%) scale(1); }
    50%      { transform: translate(-30%, -70%) scale(1.2); }
}

/* Subtle dot grid overlay for premium SaaS feel */
.vu-bg-grid {
    position: fixed;
    inset: 0;
    z-index: -6;
    pointer-events: none;
    background-image: radial-gradient(circle, rgba(96, 165, 250, 0.22) 1px, transparent 1.5px);
    background-size: 28px 28px;
    opacity: 0.7;
    mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 80%);
}

/* Reduce motion accessibility */
@media (prefers-reduced-motion: reduce) {
    body::before,
    body::after,
    .vu-bg-mesh::before,
    .vu-particle,
    .vu-gradient-line {
        animation: none !important;
    }
    .vu-reveal,
    .vu-reveal-left,
    .vu-reveal-right,
    .vu-reveal-scale {
        opacity: 1 !important;
        transform: none !important;
    }
}

/* ===== Floating Particles Layer ===== */
.vu-particles {
    position: fixed;
    inset: 0;
    z-index: -5;
    pointer-events: none;
    overflow: hidden;
}

.vu-particle {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(135deg, #60a5fa, #3b82f6);
    opacity: 0.55;
    filter: blur(0.5px);
    animation: vuParticleRise linear infinite;
    will-change: transform, opacity;
    box-shadow: 0 0 8px rgba(96, 165, 250, 0.4);
}

/* ===== Neural Network Canvas (AI feel) ===== */
.vu-neural-canvas {
    position: fixed;
    inset: 0;
    z-index: -4;
    pointer-events: none;
    width: 100%;
    height: 100%;
    opacity: 0.55;
}

/* ===== Floating AI Tech Symbols ===== */
.vu-tech-symbols {
    position: fixed;
    inset: 0;
    z-index: -3;
    pointer-events: none;
    overflow: hidden;
}

.vu-tech-sym {
    position: absolute;
    font-family: 'Fira Code', 'Courier New', monospace;
    font-weight: 600;
    color: rgba(59, 130, 246, 0.30);
    text-shadow: 0 0 8px rgba(96, 165, 250, 0.25);
    user-select: none;
    will-change: transform, opacity;
    animation: vuTechFloat linear infinite;
}

@keyframes vuTechFloat {
    0% {
        transform: translateY(110vh) translateX(0) rotate(0deg);
        opacity: 0;
    }
    8%  { opacity: 0.7; }
    50% { transform: translateY(50vh) translateX(40px) rotate(8deg); }
    92% { opacity: 0.6; }
    100% {
        transform: translateY(-15vh) translateX(-30px) rotate(-8deg);
        opacity: 0;
    }
}

/* ===== Pulsing Glow Orbs (extra AI tech feel) ===== */
.vu-orbs {
    position: fixed;
    inset: 0;
    z-index: -6;
    pointer-events: none;
    overflow: hidden;
}

.vu-orb {
    position: absolute;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: radial-gradient(circle, #60a5fa 0%, transparent 70%);
    box-shadow: 0 0 18px 4px rgba(96, 165, 250, 0.6);
    animation: vuOrbPulse 4s ease-in-out infinite;
}

@keyframes vuOrbPulse {
    0%, 100% { transform: scale(0.6); opacity: 0.4; }
    50%      { transform: scale(1.4); opacity: 1; }
}

@keyframes vuParticleRise {
    0% {
        transform: translateY(0) translateX(0) scale(0.6);
        opacity: 0;
    }
    10% { opacity: 0.4; }
    50% { transform: translateY(-50vh) translateX(20px) scale(1); }
    90% { opacity: 0.3; }
    100% {
        transform: translateY(-110vh) translateX(-30px) scale(0.8);
        opacity: 0;
    }
}

/* ===== Shimmer line accents ===== */
.vu-gradient-line {
    position: fixed;
    left: 0;
    right: 0;
    height: 2px;
    z-index: 999;
    pointer-events: none;
    background: linear-gradient(90deg, transparent 0%, #60a5fa 30%, #3b82f6 50%, #60a5fa 70%, transparent 100%);
    background-size: 200% 100%;
    opacity: 0.6;
    animation: vuShineMove 6s linear infinite;
}

.vu-gradient-line.top { top: 80px; }

@keyframes vuShineMove {
    0%   { background-position: -100% 0; }
    100% { background-position: 200% 0; }
}

/* ===== Navbar Load-in Animations ===== */
.vu-header {
    animation: vuHeaderSlideDown 0.8s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.vu-header .vu-logo-container {
    animation: vuLogoIn 0.9s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s both;
}

.vu-header .vu-logo-img {
    animation: vuLogoBreath 5s ease-in-out infinite;
}

.vu-nav-links a {
    animation: vuNavLinkIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) both;
}

.vu-nav-links a:nth-child(1) { animation-delay: 0.35s; }
.vu-nav-links a:nth-child(2) { animation-delay: 0.42s; }
.vu-nav-links a:nth-child(3) { animation-delay: 0.49s; }
.vu-nav-links a:nth-child(4) { animation-delay: 0.56s; }
.vu-nav-links a:nth-child(5) { animation-delay: 0.63s; }
.vu-nav-links a:nth-child(6) { animation-delay: 0.70s; }

@keyframes vuHeaderSlideDown {
    from { transform: translateY(-100%); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

@keyframes vuLogoIn {
    from { transform: translateX(-30px) scale(0.85); opacity: 0; }
    to   { transform: translateX(0) scale(1); opacity: 1; }
}

@keyframes vuLogoBreath {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50%      { transform: scale(1.04) rotate(2deg); }
}

@keyframes vuNavLinkIn {
    from { transform: translateY(-20px); opacity: 0; }
    to   { transform: translateY(0); opacity: 1; }
}

/* ===== Logo text gradient shift ===== */
.vu-header .vu-logo-text,
.vu-footer-logo {
    background-size: 200% auto;
    animation: vuTextShine 6s linear infinite;
}

@keyframes vuTextShine {
    0%   { background-position: 0% center; }
    100% { background-position: 200% center; }
}

/* ===== Footer load reveal ===== */
.vu-footer {
    animation: vuFadeInBottom 1s ease-out both;
    animation-delay: 0.2s;
}

@keyframes vuFadeInBottom {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== Scroll Reveal Classes (triggered by JS) ===== */
.vu-reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    will-change: opacity, transform;
}
.vu-reveal-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.vu-reveal-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}
.vu-reveal-scale {
    opacity: 0;
    transform: scale(0.85);
    transition: opacity 0.8s ease-out, transform 0.8s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.vu-reveal.visible,
.vu-reveal-left.visible,
.vu-reveal-right.visible,
.vu-reveal-scale.visible {
    opacity: 1;
    transform: none;
}

/* Stagger children inside any container */
.vu-reveal.visible > * {
    animation: vuFadeInUp 0.7s ease-out both;
}
.vu-reveal.visible > *:nth-child(1) { animation-delay: 0.05s; }
.vu-reveal.visible > *:nth-child(2) { animation-delay: 0.15s; }
.vu-reveal.visible > *:nth-child(3) { animation-delay: 0.25s; }
.vu-reveal.visible > *:nth-child(4) { animation-delay: 0.35s; }
.vu-reveal.visible > *:nth-child(5) { animation-delay: 0.45s; }
.vu-reveal.visible > *:nth-child(6) { animation-delay: 0.55s; }

@keyframes vuFadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* ===== Subtle continuous breathing on h1/h2 to add life ===== */
.vu-fade-in {
    animation: vuFadeInUp 0.8s ease-out both;
}

/* ===== Shared Header / Navigation (Logo-matched Light Blue) ===== */
.vu-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 12px 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    background: rgba(219, 234, 254, 0.88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: all 0.35s ease;
    border-bottom: 1px solid rgba(96, 165, 250, 0.25);
    box-shadow: 0 2px 18px rgba(30, 58, 138, 0.10);
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.vu-header.scrolled {
    background: rgba(219, 234, 254, 0.96);
    padding: 8px 5%;
    box-shadow: 0 4px 22px rgba(30, 58, 138, 0.15);
}

.vu-header .vu-logo-container {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    transition: transform 0.3s ease;
}

.vu-header .vu-logo-container:hover {
    transform: translateY(-1px);
}

.vu-header .vu-logo-img {
    height: 50px;
    width: auto;
    background: transparent;
    transition: transform 0.3s ease;
}

.vu-header .vu-logo-container:hover .vu-logo-img {
    transform: scale(1.05);
}

.vu-header .vu-logo-text {
    font-size: 17px;
    font-weight: 700;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 50%, #3b82f6 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    line-height: 1.2;
    letter-spacing: 0.3px;
}

.vu-nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.vu-nav-links a {
    color: #334155;
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.3s;
    position: relative;
    padding: 6px 0;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.vu-nav-links a:hover,
.vu-nav-links a.active {
    color: var(--vu-accent-deep);
}

.vu-nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--vu-accent-deep), var(--vu-accent-bright));
    border-radius: 2px;
    transition: width 0.35s ease;
}

.vu-nav-links a:hover::after,
.vu-nav-links a.active::after {
    width: 100%;
}

/* Mobile nav toggle */
.vu-mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--vu-accent-deep);
    font-size: 1.7rem;
    cursor: pointer;
    z-index: 1001;
    transition: transform 0.3s ease;
}

.vu-mobile-toggle:hover {
    transform: scale(1.1);
}

.vu-mobile-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 290px;
    height: 100vh;
    background: rgba(219, 234, 254, 0.98);
    backdrop-filter: blur(15px);
    z-index: 999;
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    padding: 95px 30px 30px;
    display: flex;
    flex-direction: column;
    gap: 6px;
    box-shadow: -10px 0 30px rgba(30, 58, 138, 0.20);
    border-left: 1px solid rgba(96, 165, 250, 0.25);
}

.vu-mobile-nav.active {
    right: 0;
}

.vu-mobile-nav a {
    color: #334155;
    text-decoration: none;
    font-size: 1.1rem;
    padding: 14px 0;
    border-bottom: 1px solid rgba(30, 58, 138, 0.08);
    transition: all 0.3s;
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.vu-mobile-nav a:hover,
.vu-mobile-nav a.active {
    color: var(--vu-accent-deep);
    padding-left: 12px;
}

.vu-mobile-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.65);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s;
}

.vu-mobile-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Spacer so fixed header doesn't overlap content on inner pages */
.vu-header-spacer {
    height: 80px;
}

/* ===== Shared Footer ===== */
.vu-footer {
    background: linear-gradient(180deg, var(--vu-bg-darker) 0%, #020610 100%);
    padding: 70px 5% 30px;
    text-align: center;
    color: var(--vu-text-light);
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    margin-top: 60px;
    position: relative;
    border-top: 1px solid rgba(96, 165, 250, 0.12);
}

.vu-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--vu-accent), transparent);
    opacity: 0.5;
}

.vu-footer-logo {
    font-size: 1.7rem;
    font-weight: 800;
    background: linear-gradient(135deg, #ffffff 0%, #93c5fd 50%, #60a5fa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 18px;
    display: inline-block;
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: filter 0.3s;
}

.vu-footer-logo:hover {
    filter: brightness(1.2);
}

.vu-footer-tagline {
    color: var(--vu-text-muted);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.7;
    font-size: 0.98rem;
}

.vu-footer-links {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin-bottom: 35px;
    flex-wrap: wrap;
}

.vu-footer-links a {
    color: var(--vu-text-soft);
    text-decoration: none;
    transition: all 0.3s;
    font-size: 0.98rem;
    position: relative;
}

.vu-footer-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--vu-accent);
    transition: width 0.3s;
}

.vu-footer-links a:hover {
    color: var(--vu-accent);
}

.vu-footer-links a:hover::after {
    width: 100%;
}

.vu-social-links {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 35px;
    flex-wrap: wrap;
}

.vu-social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    border-radius: 50%;
    background: rgba(96, 165, 250, 0.08);
    color: var(--vu-accent);
    font-size: 1.2rem;
    text-decoration: none;
    transition: all 0.35s ease;
    border: 1px solid rgba(96, 165, 250, 0.25);
}

.vu-social-links a:hover {
    background: linear-gradient(135deg, var(--vu-accent), var(--vu-accent-bright));
    color: #ffffff;
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 10px 25px rgba(96, 165, 250, 0.45);
    border-color: transparent;
}

.vu-copyright {
    color: #64748b;
    padding-top: 28px;
    border-top: 1px solid rgba(96, 165, 250, 0.1);
    margin-top: 25px;
    font-size: 0.88rem;
}

/* ===== WhatsApp Floating Button ===== */
.vu-whatsapp {
    position: fixed;
    bottom: 28px;
    left: 28px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #25D366;
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.6rem;
    box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45);
    z-index: 901;
    transition: all 0.3s ease;
    animation: vuWhatsappPulse 2.5s ease-in-out infinite;
}

.vu-whatsapp:hover {
    transform: translateY(-4px) scale(1.05);
    box-shadow: 0 12px 30px rgba(37, 211, 102, 0.6);
    background: #20bd5a;
}

.vu-whatsapp::before {
    content: '';
    position: absolute;
    inset: -6px;
    border-radius: 50%;
    border: 2px solid rgba(37, 211, 102, 0.5);
    animation: vuWhatsappRing 2s ease-out infinite;
}

@keyframes vuWhatsappPulse {
    0%, 100% { box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45), 0 0 0 0 rgba(37, 211, 102, 0.6); }
    50%      { box-shadow: 0 8px 25px rgba(37, 211, 102, 0.45), 0 0 0 14px rgba(37, 211, 102, 0); }
}

@keyframes vuWhatsappRing {
    0%   { transform: scale(1); opacity: 1; }
    100% { transform: scale(1.5); opacity: 0; }
}

@media (max-width: 768px) {
    .vu-whatsapp {
        bottom: 20px;
        left: 20px;
        width: 50px;
        height: 50px;
        font-size: 1.4rem;
    }
}

/* ===== Back-to-top button ===== */
.vu-back-top {
    position: fixed;
    bottom: 28px;
    right: 28px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--vu-accent), var(--vu-accent-bright));
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border: none;
    font-size: 1.1rem;
    box-shadow: 0 8px 25px rgba(96, 165, 250, 0.45);
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all 0.35s ease;
    z-index: 900;
}

.vu-back-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.vu-back-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(96, 165, 250, 0.6);
}

/* ===== Reusable Animations ===== */
@keyframes vuFadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes vuFloat {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes vuGlow {
    0%, 100% { box-shadow: 0 0 18px rgba(96, 165, 250, 0.3); }
    50% { box-shadow: 0 0 30px rgba(96, 165, 250, 0.6); }
}

@keyframes vuShine {
    0% { background-position: -200% center; }
    100% { background-position: 200% center; }
}

.vu-fade-in {
    animation: vuFadeInUp 0.8s ease-out both;
}

.vu-float {
    animation: vuFloat 6s ease-in-out infinite;
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
    .vu-header .vu-logo-text {
        font-size: 15px;
    }
    .vu-nav-links {
        gap: 22px;
    }
}

@media (max-width: 768px) {
    .vu-nav-links {
        display: none;
    }
    .vu-mobile-toggle {
        display: block;
    }
    .vu-header {
        padding: 10px 5%;
    }
    .vu-header .vu-logo-img {
        height: 42px;
    }
    .vu-header .vu-logo-text {
        font-size: 14px;
    }
    .vu-header-spacer {
        height: 70px;
    }
    .vu-footer-links {
        gap: 18px;
    }
    .vu-footer-logo {
        font-size: 1.4rem;
    }
    .vu-back-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .vu-header .vu-logo-text {
        font-size: 12px;
    }
    .vu-header .vu-logo-img {
        height: 36px;
    }
    .vu-footer-links {
        flex-direction: column;
        gap: 12px;
    }
}